Physics-

#### Four concurrent coplanar forces in newton are acting at a point and keep it in equilibrium figure. Then values of and are

Physics-General

- 2 N,
- 1 N, 60
- 2 N, 90
- N,90

#### Answer:The correct answer is: 2 N, 90In equilibrium position along -direction

2 sin 60

or or

As

or

Along -direction,

N

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### Related Questions to study

physics-

#### The effective capacitance between points and shown in figure. Assuming F and that outer capacitors are all F is

The arrangement shows a Wheatstone bridge.

As therefore the bridge is balanced.

Similarly,

effective capacitance

As therefore the bridge is balanced.

Similarly,

effective capacitance

#### The effective capacitance between points and shown in figure. Assuming F and that outer capacitors are all F is

physics-General

The arrangement shows a Wheatstone bridge.

As therefore the bridge is balanced.

Similarly,

effective capacitance

As therefore the bridge is balanced.

Similarly,

effective capacitance

physics-

#### The four capacitors, each of 25 F are connected as shown in figure. The DC voltmeter reads 200 V. the change on each plate of capacitor is

Charge on each plate of each capacitor

#### The four capacitors, each of 25 F are connected as shown in figure. The DC voltmeter reads 200 V. the change on each plate of capacitor is

physics-General

Charge on each plate of each capacitor

physics-

#### For the circuit shown in figure the charge on 4F capacitor is

Combined capacity of and = 1 + 5=

Now, and are in series.

Charge in the arm containing capacitor is

Now, and are in series.

Charge in the arm containing capacitor is

#### For the circuit shown in figure the charge on 4F capacitor is

physics-General

Combined capacity of and = 1 + 5=

Now, and are in series.

Charge in the arm containing capacitor is

Now, and are in series.

Charge in the arm containing capacitor is

physics-

#### The variation of electric potential with distance from a fixed point is shown in figure. What is the value of electric field at =2 m.

#### The variation of electric potential with distance from a fixed point is shown in figure. What is the value of electric field at =2 m.

physics-General

maths-

#### The integrating factor of the differential equation is given by

#### The integrating factor of the differential equation is given by

maths-General

physics-

#### As shown in figure, if the point is earthed and the point is given a potential of 2000 V, then the potential at point will be

Equivalent capacitance between points is

Now equivalent capacitance between points is

Charge on capacitor of capacity 5 is

(Since, potential at the point will be zero)

Now, potential difference across capacitor of 5 is

=1500volt

As,volt

Hence, volt.

Now equivalent capacitance between points is

Charge on capacitor of capacity 5 is

(Since, potential at the point will be zero)

Now, potential difference across capacitor of 5 is

=1500volt

As,volt

Hence, volt.

#### As shown in figure, if the point is earthed and the point is given a potential of 2000 V, then the potential at point will be

physics-General

Equivalent capacitance between points is

Now equivalent capacitance between points is

Charge on capacitor of capacity 5 is

(Since, potential at the point will be zero)

Now, potential difference across capacitor of 5 is

=1500volt

As,volt

Hence, volt.

Now equivalent capacitance between points is

Charge on capacitor of capacity 5 is

(Since, potential at the point will be zero)

Now, potential difference across capacitor of 5 is

=1500volt

As,volt

Hence, volt.

physics-

#### The equivalent capacitance between points for the combination of capacitors shown in figure, where all capacitances are in microfarad is

all the three capacitors are connected in parallel. Therefore, equivalent capacitance between points is

.

As are in series,

Similarly, are in parallel

are in series

Now, are in parallel.

.

As are in series,

Similarly, are in parallel

are in series

Now, are in parallel.

#### The equivalent capacitance between points for the combination of capacitors shown in figure, where all capacitances are in microfarad is

physics-General

all the three capacitors are connected in parallel. Therefore, equivalent capacitance between points is

.

As are in series,

Similarly, are in parallel

are in series

Now, are in parallel.

.

As are in series,

Similarly, are in parallel

are in series

Now, are in parallel.

physics-

#### The effective capacitance between points is

#### The effective capacitance between points is

physics-General

physics-

#### characteristic of a copper wire of length and area of cross-section is shown in figure. The slope of the curve becomes

Slope of graph

If experiment is performed at higher temperature then resistance increase and hence slope decrease, choice (a) is wrong.

Similarly in choice (b) and (c) resistance increase.

But for choice (d) resistance R increases, so slope decreases

If experiment is performed at higher temperature then resistance increase and hence slope decrease, choice (a) is wrong.

Similarly in choice (b) and (c) resistance increase.

But for choice (d) resistance R increases, so slope decreases

#### characteristic of a copper wire of length and area of cross-section is shown in figure. The slope of the curve becomes

physics-General

Slope of graph

If experiment is performed at higher temperature then resistance increase and hence slope decrease, choice (a) is wrong.

Similarly in choice (b) and (c) resistance increase.

But for choice (d) resistance R increases, so slope decreases

If experiment is performed at higher temperature then resistance increase and hence slope decrease, choice (a) is wrong.

Similarly in choice (b) and (c) resistance increase.

But for choice (d) resistance R increases, so slope decreases

physics-

#### A gang capacitor is formed by interlocking a number of plates as shown in figure. The distance between the consecutive plates is 0.885 cm and the overlapping area of the plates is The capacity of the unit is

The given arrangement of nine plates is equivalent to the parallel combination of 8 capacitors.

The capacity of each capacitor,

Hence, the capacity of 8 capacitors

The capacity of each capacitor,

Hence, the capacity of 8 capacitors

#### A gang capacitor is formed by interlocking a number of plates as shown in figure. The distance between the consecutive plates is 0.885 cm and the overlapping area of the plates is The capacity of the unit is

physics-General

The given arrangement of nine plates is equivalent to the parallel combination of 8 capacitors.

The capacity of each capacitor,

Hence, the capacity of 8 capacitors

The capacity of each capacitor,

Hence, the capacity of 8 capacitors

physics-

#### A parallel plate capacitor with air as the dielectric has capacitance A slab of dielectric constant and having the same thickness as the separation between the plates is introduced so as to fill one-fourth of the capacitor as shown in the figure. The new capacitance will be

The capacitor with air as the dielectric has capacitance

Similarly, the capacitor with as the dielectric constant has capacitance

Since, are in parallel

Similarly, the capacitor with as the dielectric constant has capacitance

Since, are in parallel

#### A parallel plate capacitor with air as the dielectric has capacitance A slab of dielectric constant and having the same thickness as the separation between the plates is introduced so as to fill one-fourth of the capacitor as shown in the figure. The new capacitance will be

physics-General

The capacitor with air as the dielectric has capacitance

Similarly, the capacitor with as the dielectric constant has capacitance

Since, are in parallel

Similarly, the capacitor with as the dielectric constant has capacitance

Since, are in parallel

physics-

#### Two inclined planes are located as shown in figure. A particle is projected from the foot of one frictionless plane along its line with a velocity just sufficient to carry it to top after which the particle slides down the other frictionless inclined plane. The total time it will take to reach the point is

The time of ascent = time of descent

total time of flight

or

total time of flight

or

#### Two inclined planes are located as shown in figure. A particle is projected from the foot of one frictionless plane along its line with a velocity just sufficient to carry it to top after which the particle slides down the other frictionless inclined plane. The total time it will take to reach the point is

physics-General

The time of ascent = time of descent

total time of flight

or

total time of flight

or

maths-

#### Period of is

#### Period of is

maths-General

physics-

#### Four capacitors are connected in a circuit as shown in the following figure. Calculate the effective capacitance between the points .

Effective capacitance of

Now, are in parallel, therefore effective capacitance

Now, are in series, therefore,

effective capacitance between points

Now, are in parallel, therefore effective capacitance

Now, are in series, therefore,

effective capacitance between points

#### Four capacitors are connected in a circuit as shown in the following figure. Calculate the effective capacitance between the points .

physics-General

Effective capacitance of

Now, are in parallel, therefore effective capacitance

Now, are in series, therefore,

effective capacitance between points

Now, are in parallel, therefore effective capacitance

Now, are in series, therefore,

effective capacitance between points

physics-

#### Equivalent capacitance between is

The capacitors 2 and 2 of arm are in series. So, their equivalent capacitance is 1 which is in parallel with capacitor of 1 of arm .

So, equivalent capacitance now is 2.

This capacitance is now in series with 2 capacitance of arm which equivalents to 1 is in parallel with 1 capacitance of arm

So, final effective capacitance=2.

#### Equivalent capacitance between is

physics-General

The capacitors 2 and 2 of arm are in series. So, their equivalent capacitance is 1 which is in parallel with capacitor of 1 of arm .

So, equivalent capacitance now is 2.

This capacitance is now in series with 2 capacitance of arm which equivalents to 1 is in parallel with 1 capacitance of arm

So, final effective capacitance=2.