DIAGNOSTIK TEST 8DSH28

The position of two particles X and Y of charges +q and +2q respectively are fixed. Which of the following figures correctly shows the direction and magnitude of the forces on the particles?

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• 
• 
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Four points charge are fixed at the corners of a square as shown in the figure. The direction of the electric field at the central O is ...

• A

• B

• C

• D

At twice the distance from a point charge, the strength of the electric field IS ...

• four times its original value

• twice its original value

• one-half its original value

• one-fourth its original value

Which figure correctly shows the equipotential lines around a positive point charges if the

potential difference between successive line are equal?

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• 
• 
• 

Which of the following statement is NOT correct?

• There are two types of charges differing in magnitude and signs

• The charges are conserved and they have discrete values

• The smallest value of a charge is that of an electron or a proton.

• Electric charge can be created by rubbing or friction

Which of the following statement does NOT describe a capacitor an electrical device?

• It stores charge and electrical potential energy.

• It is manufactured in many sizes and shapes.

• It is used to smooth out unwanted fluctuation due to power surges in electronic circuits.

• It allows current to pass through in any condition.

If capacitors are connected in parallel, then potential difference across each capacitor is ...

• same

• different

• zero

• infinite

Which of the following depends on charging and discharging rate of a capacitor?

• Power

• Current

• Time constant

• Voltage

During charging process, when will be capacitor fully charged?

• When voltage is zero

• When the supply voltage is equal to the capacitor voltage

• When voltage is infinity

• When capacitor voltage is equal to half of the supply voltage

A capacitor of two parallel conducting plates which are separated by a piece of dielectric, is

fully charged by a battery. The capacitance of the capacitor will change if

• the capacitor is not fully charged.

• the battery of different voltage is used.

• different dielectric is used.

• the conducting plates of different metals are used.