Physics-
General
Easy

Question

A particle of charge +q and mass m moving under the influnce of a uniform electric field E stack i with hat on top and a uniform magnetic field B stack k with hat on top follows trajectory from P to Q as shown in figure The velocities at P and Q v stack i with hat on top and negative 2 v stack j with hat on top respectively Which of the following statement(s) is/are correct

  1. E equals fraction numerator 3 over denominator 4 end fraction fraction numerator m v to the power of 2 end exponent over denominator q a end fraction    
  2. Rate of work done by electric field at P is fraction numerator 3 over denominator 4 end fraction fraction numerator m v to the power of 3 end exponent over denominator a end fraction    
  3. Rate of work done by electric field at P is zero    
  4. Rate of work done by both the fields at Q is zero    

The correct answer is: E equals fraction numerator 3 over denominator 4 end fraction fraction numerator m v to the power of 2 end exponent over denominator q a end fraction

Related Questions to study

General
chemistry-

The products formed in the following reaction, space C subscript 6 H subscript 5 long dash O long dash C H subscript 3 plus H I left parenthesis rightwards arrow ┴ H e a t right parenthesisare:

The products formed in the following reaction, space C subscript 6 H subscript 5 long dash O long dash C H subscript 3 plus H I left parenthesis rightwards arrow ┴ H e a t right parenthesisare:

chemistry-General
General
physics-

A man 80 kg is supported by two cables as shown in the figure. Then the ratio of tensions T subscript 1 end subscript and T subscript 2 end subscript is

A man 80 kg is supported by two cables as shown in the figure. Then the ratio of tensions T subscript 1 end subscript and T subscript 2 end subscript is

physics-General
General
maths-

L t subscript x not stretchy rightwards arrow 0 end subscript fraction numerator square root of 1 plus x end root minus square root of 1 plus x squared end root over denominator square root of 1 minus x squared end root minus square root of 1 minus x end root end fraction

L t subscript x not stretchy rightwards arrow 0 end subscript fraction numerator square root of 1 plus x end root minus square root of 1 plus x squared end root over denominator square root of 1 minus x squared end root minus square root of 1 minus x end root end fraction

maths-General
parallel
General
Maths-

L t subscript x not stretchy rightwards arrow 0 end subscript fraction numerator square root of open parentheses 1 plus x plus x squared close parentheses end root minus 1 over denominator x end fraction

L t subscript x not stretchy rightwards arrow 0 end subscript fraction numerator square root of open parentheses 1 plus x plus x squared close parentheses end root minus 1 over denominator x end fraction

Maths-General
General
Maths-

Lt subscript x not stretchy rightwards arrow 3 end subscript fraction numerator x cubed minus 8 x squared plus 45 over denominator 2 x squared minus 3 x minus 9 end fraction

Lt subscript x not stretchy rightwards arrow 3 end subscript fraction numerator x cubed minus 8 x squared plus 45 over denominator 2 x squared minus 3 x minus 9 end fraction

Maths-General
General
chemistry-

Oxygen atom of ether is:

Oxygen atom of ether is:

chemistry-General
parallel
General
physics-

A long current carrying wire, carrying current such that it is flowing out from the plane of paper, is placed at O A steady state current is flowing in the loop ABCD

A long current carrying wire, carrying current such that it is flowing out from the plane of paper, is placed at O A steady state current is flowing in the loop ABCD

physics-General
General
physics-

A loop carrying current I lies in the x-y plane as shown in fig The unit vector k^ is coming out of the plane of the paper The magnetic moment of the current loop is

A loop carrying current I lies in the x-y plane as shown in fig The unit vector k^ is coming out of the plane of the paper The magnetic moment of the current loop is

physics-General
General
physics-

A particle originally at rest at the highest point of a smooth vertical circle is slightly displaced. It will leave the circle at a vertical distance h below the highest point such that

A particle originally at rest at the highest point of a smooth vertical circle is slightly displaced. It will leave the circle at a vertical distance h below the highest point such that

physics-General
parallel
General
physics-

In figure, a particle is placed at the highest point A of a smooth sphere of radius r. It is given slight push, and it leaves the sphere at B, at a depth h vertically below A such that h is equal to

In figure, a particle is placed at the highest point A of a smooth sphere of radius r. It is given slight push, and it leaves the sphere at B, at a depth h vertically below A such that h is equal to

physics-General
General
Maths-

Lt subscript x not stretchy rightwards arrow 0 end subscript fraction numerator e to the power of tan space x end exponent minus e to the power of x over denominator tan space x minus x end fraction

Lt subscript x not stretchy rightwards arrow 0 end subscript fraction numerator e to the power of tan space x end exponent minus e to the power of x over denominator tan space x minus x end fraction

Maths-General
General
Maths-

Lt subscript x not stretchy rightwards arrow 0 end subscript space fraction numerator x times 2 to the power of x minus x over denominator 1 minus cos space x end fraction

Lt subscript x not stretchy rightwards arrow 0 end subscript space fraction numerator x times 2 to the power of x minus x over denominator 1 minus cos space x end fraction

Maths-General
parallel
General
chemistry-

C-O-C angle would be maximum in

C-O-C angle would be maximum in

chemistry-General
General
physics-

A circular loop of radius 20cm is placed in a uniform magnetic field B=2T in X-Yplane the loop carries a current 1A in the direction shown in figure The magnitude of torque acting on the loop is nearly

A circular loop of radius 20cm is placed in a uniform magnetic field B=2T in X-Yplane the loop carries a current 1A in the direction shown in figure The magnitude of torque acting on the loop is nearly

physics-General
General
physics-

Two 1ong wires are placed parallel to each other 10cm apart as shown in fig The magnetic field at piont P is

Two 1ong wires are placed parallel to each other 10cm apart as shown in fig The magnetic field at piont P is

physics-General
parallel

card img

With Turito Academy.

card img

With Turito Foundation.

card img

Get an Expert Advice From Turito.

Turito Academy

card img

With Turito Academy.

Test Prep

card img

With Turito Foundation.