Olympiad Test: Electric Current & its Effects
20 Questions MCQ Test General Science(Prelims) by IRS Divey Sethi | Olympiad Test: Electric Current & its Effects
A ____________ is used in torches.
A dry cell is used in torches and other devices that are mobile.
MCB in electric circuit stand for
MCB is electric circuit stands for miniature circuit breaker used to break circuit in case of excess of current.
Electromagnet is used in
Electromagnet is used in electric bell. When switch is closed the, current flows and electric bell works.
Electric current is measured by a device
Electric current is measured by a device called ammeter. It is always connected in series in circuit.
Fuse wire is made up of alloys of
Fuse wire is made up of alloys of low melting point that melts if higher current flows through the circuit.
Coils of heating devices are made up of
The coils of heating devices are made up of Nichrome, which is an alloy having very high resistance and high melting point.
Wire carrying current produce attracts the magnetic material due to
Wire carrying current produce attracts the magnetic material due to magnetic field.
A material having very high resistance is called
A material having very high resistance is called an insulator.
Potential difference is created in a electric circuit due to
Potential difference is created in an electric circuit due to cell or battery.
Heating effect of electric current is used in
Heating effect of electric current is used in bread toaster having coils of high resistance and melting point.
Fuse wire is used in electric circuit to prevent
Fuse is a safety device that is used in electric circuit to prevent electrical appliances and circuit in case of very high current.
The metal which is poor conductor of electricity is
All metals are good conductor of electricity but mercury is poor conductor of electricity.
A device that break the electric circuit in case of excess current is called
A device that breaks the electric circuit in case of excess of current is called fuse wire.
Which of the following metal is best conductor of electric current?
Silver metal is best conductor of electric current out of all metals due to very high resistivity.
A device that converts the electrical energy into heat energy is
Heater is a device that converts the electric energy into heat energy.
Nichrome is used a coil of heater because
Nichrome is used in coil of heater because it has high resistance and high melting point.
Combination of two or more cell in series is called
Combination of two or more cell in series is called battery. Battery creates potential difference to flow current.
Closed and continuous path of electric current is called
Closed and continuous path of electric current is called electric circuit.
Coming together of live wire and fuse wire in a circuit is called
When live wire and neutral wire of a circuit come together, short circuit occurs to increase the temperature of circuit.
In electrical wiring, the wire with black insulation is usually
In electrical wiring, the wire with black insulation is usually neutral wire and red insulation with live wire.
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