Q1. The coil with many loops in an electric bell is called:
(a) Bar magnet
(d) Both (b) and (c)
Q2. The magnetic strength of an electro magnet
(a) Can be increased by increasing the number of loops.
(b) can be increased by increasing the amount of electric current.
(c) Cannot be increased.
(d) Both (a)and (b).
Q3. An electromagnet is a
(a) Temporary magnet
(b) Permanent magnet
(c) Depends on its use
(d) Cannot be said
Q4. Metals used for making an electric fuse should have
(a) low melting point and high resistance.
(b) low melting point and low resistance.
(c) high melting point and high resistance.
(d) high melting point and low resistance.
Q5. In water heaters, the heating coil is made of a metal that has _____ and wire connecting it to main power supply is made of metal that has_____________.
(a) high resistance, high resistance
(b) low resistance, low resistance
(c) high resistance, low resistance
(d) low resistance, high resistance
Q6. In a parallel circuit,
(a) Voltage remains the same.
(b) one bulb can stop glowing.
(c) current is variable in different branches.
(d) all of these
Q7. The positive terminal in a cell means
(a) High potential and more number of electrons.
(b) High potential and less number of electrons.
(c) Low potential and more number of electrons.
(d) Low potential and less number of electrons.
Q8. In an electric bell, the circuit breaks when
(a) the switch is turned off.
(b) the metal arm hits the gong.
(c) Both (a) and (b)
(d) None of these
Q9. An ammeter is used to measure ________________ and is always connected in ______________.
(a) voltage, parallel
(b) current, parallel
(c) current, series
(d) voltage, series
Q10. Which of the following is a natural magnet?
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