Electrostatics Test

Result

Electrostatics Test - 102

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Weekly Quiz Competition

Question 1
4 / -1

The work done in bringing a 20 coulomb charge from point A to point B for distance 0.2 m is 2 J. The potential difference between the two points will be (in volt)

A
0.2

B
0

C
0.1

D
0.4

Solution
Question 2
4 / -1

A hollow sphere of charge does not produce an electricfield at any

A
Point beyond 2 m

B
Point beyond 10 m

C
Interior point

D
Outer point
Question 3
4 / -1

Kinetic energy of an electron accelerated in a potential difference of 100 V is

A
1.6 × 10^–17 J

B
1.6 × 10²¹ J

C
1.6 × 10^–29 J

D
1.6 × 10^–34 J

Solution
Question 4
4 / -1

If identical charges (–q) are placed at each corner of a cube of side b, then electric potential energy of charge(+q) which is placed at centre of the cube will be

A

B

C

D

Solution
Question 5
4 / -1

An electron having charge \'e\' and mass \'m\' is moving in a uniform electric field E. Its acceleration will be

A

B

C

D

Solution
Question 6
4 / -1

Cathode rays travelling from East to West enter into region of electric field directed towards North to South in the plane of paper. The deflection of cathode rays is towards

A
East

B
South

C
West

D
North
Question 7
4 / -1

A
Negative, increase

B
Positive, decrease

C
Negative, decrease

D
Positive increase
Question 8
4 / -1

A simple pendulum of period T has a metal bob which is negatively charged. If it is allowed to oscillate above a positively charged metal plate, its period will

A
Remains equal to T

B
Less than T

C
Greater than T

D
Infinite

Solution
Question 9
4 / -1

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 kV,its kinetic energy will be

A
1840 keV

B
1/1840 keV

C
1 keV

D
920 keV

Solution
Question 10
4 / -1

An electron moving with the speed 5 × 10⁶ m per sec is shooted parallel to the electric field of intensity 1× 10³ N/C. Field is responsible for the retardation of motion of electron. Now evaluate the distance travelled by the electron before coming to rest for an instant (mass of e= 9 × 10^–31 kg. charge = 1.6 × 10^–19 C)

A
7m

B
0.7 mm

C
7 cm

D
0.7 cm

Solution