Numericals (1 min)
Theory (1 min)
Units (10 seconds)
100
A circuit has 5 resistors of 2 ohm each in series. It also has 3 resistors of 9ohm each in parallel. What is the effective resistance of the circuit?
13 ohm
100
These atomic particles cause the production of current.
Electrons!
100
SI Unit of work?
Joule
200
Find the current in the system.
3A
200
What is the heating effect of current?
If an electric circuit is purely resistive, the source of energy continually gets dissipiated entirely in the form of heat. This is known as Heating Effect of Electric Current.
200
What is the SI unit of resistivity?
Ohm m
300
An electric bulb is connected to a 220V generator. The current is 0.50A. What is the power of the bulb ?
110 W
300
Name 2 metals which can be used to make a fuse wire.
Aluminium, copper, iron, lead, etc.
300
What is the commercial unit of power?
kWh (kilo watt hour)
400
What is the missing voltage?
3 Volts!
400
What is a circuit fuse? What is it used for?
A circuit fuse is a safety device that protects our electrical devices in case of a short circuit or an overload.
400
Express potential difference in terms of work and charge.
V= W/Q
500
Show the relationship between the commercial unit and S.I unit of power.
1 kWh= 3.6x106 j
500
What is present inside a bulb?
Tungsten filament and inactive gases like Nitrogen and Argon.
500
Express 1 Watt in terms of potential difference and current.
1 Watt= 1Volt x 1Ampere