The S.I unit of potential difference is named after whom?
Andre Ampere
Alessandro Volta
George Simon Ohm
Michael Faraday
The space inside the bulb
Is vaccum
Is filled with chemically inactive nitrogen & argon
Is filled with Oxygen
Is filled with hydrogen
According to Joule's law, the quantity of heat (H) generated in a conductor of Resistance (R), when a current (I) flows through it for a time (t), is not proportional to
The Voltage
The time for which the current flows
The current
None of these
What is the resistance of an ideal voltmeter?
Low
High
Infinity
Zero
Why are copper wires used as connecting wires ?
copper is available in abundance
copper conducts electricity and heats up appliances.
Electrical resistivity of copper is low.
Copper is cheap.
Which of the following diagram represents a variable resistance ?
A Charge of 210 C is flowing through a circuit for 5 minutes. find the current in the circuit?
0.6 A
0.7 A
0.8 A
0.9 A
What is the S.I unit of charge?
Ampere
Coulomb
Volt
Ohm
Current is expressed in
Which of the following statement is not correct ?
i) If the resistors are connected in series, the current is the same in every part of the circuit.
ii) Series combination is used to increase resistance in a circuit.
iii) If the resistors are connected in parallel, the effective resistance of the combination is more than the individual resistance in the combination.
iv) In parallel combination, the voltage across each resistor is different.
(i) &(ii)
(ii) & (iv)
(ii) & (iii)
(iii) & (iv)
