Question

(a conductor (b)resistor
(d) superconductor, dinsulator
14. Keeping the potential difference constant, the resistance of a circuit is halved. the current will
become
(a)one fourth (b)four times (c)hall
(d) double
15. When the diameter of a wire is doubled, its resistance becomes
(a)double (b)four times (c) one half
(d)one fourth
16.
is a symbol for
(a)an open key (b) a voltmeter (cjan ammeter
(d) a closed key
17. The heat produced in a wire of resistance 'sº when a current 'y flows through it in time "z' is given
by
(a)xyz
(b)xzy?
(c)yzx
18. A wire of resistance 1 N is divided into two halves and both halves are connected in parallel. The new
resistance will be
(a)1 22
(b)292
(c)0.50
(d)0.2522
19. If two resistors 25 12 and 15 22 are joined together in series and then placed in parallel with a 4002
resistor, the effective resistance of the combination is
(a)0.1 22
(b)1022
(c)20 12
(d)40 22
20. Number of electrons in Icoulomb of charge
(a)6.25x1018 (b)6.25x1015
(c)6.25x10
(d)6.25 10 15​

Answer 1

Answer:

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