Electrostatics and Current Electricity MCQ's

08:26:00 Unknown 1 Comments

1. A body acquires positive charge. This means that the body

A) has gained protons
B) has gained positrons
C) has gained alpha particles
D) has lost electrons

2. Electric potential energy per unit charge gives the expression for

A) Electric intensity
B) Electric flux
C) Electric potential
D) power

3. In electrolysis process of CuSO4, Cu is deposited

A) on anode
B) On cathode
C) Either anode or cathode
D) Can not be deposited

4. A hollow insulated conduction sphere is given a positive charge of 10 micro C. What will be the electric field at the centre of the sphere if its radius is 2 meter?

A) 5 micro coluomb per meter square
B) 20
C) 8
D) zero

5. In the direction of electric field intensity, the potential:

A) Decreases
B) Increases
C) Remains unchanged
D) Decreases up to some distance and then begins to increase

6. When two charged bodies are connected but no current flows between them then they have same

A) Charge
B) Potential
C) Specific charge density
D) Capacitance

7. Gauss's law is applicable by considering Gaussian surface. The Gaussian surface must has shape which is

A) spherical
B) cylindrical
C) box type
D) any arbitrary closed shpe

8. The black dry powder sprayed over the drum of photo copier is

A) neutral
B) positively charged
C) negatively charged
D) none

9. 25 watt, a 40 watt and 100 watt lamps are connected in series across the mains. The one which will light brightest is

A) 25 w lamp
B) 40 w lamp
C) 100 w lamp
D) all will glow equally bright

10. A 100 W bulb is used for 10 hours. What is the cost of operation if 1 kW/h costs Re. 1?

A) 0.5
B) 1
C) 1.5
D) 2