Current Electricity

Symbol for the potential differences is .....

• I

• V

• R

• C

This is known as ohm's law.....

• V = I + R

• V = I ÷ R

• V = I - R

• V = I × R

The unit of resistivity in SI unit is......

• Ohm meter

• Ametre

• Voltmetre

• Metre

Those substances which have very low resistance are called as.....

• Conductors

• Insulators

• Ametre

• Voltmetre

Arrangement is used to increase the resistance in a circuit.

• Resistors connected in parallel

• Resistors connected in series

• Resistors connected in alternate

• Resistors connected in combination.

Arrangement used to reduce the resistance in a circuit

• Resistors connected in alternate

• Resistors connected in series

• Resistors connected in parallel

• Resistors connected in combination

The symbol used to express the current is......

• V

• I

• R

• C

Small value of current 1μA = ...

• 10⁻⁶A

• 10⁻³A

• 10⁶A

• 10³A

Small value of potential difference is expressed in 1μV =.....

• 10⁻³

• 10³

• 10⁻⁶

• 10⁶

This is the formula for the effective resistance connected in .........

Rs = R1+ R2+ R3+ R4..... Rn.

• Resisteres connected in series.

• Resisteres connected in parallel.