Practice Test: Question Set - 06
1. The condition for the validity under Ohm's law is that
- (A) Resistance must be uniform
- (B) Current should be proportional to the size of the
resistance
- (C) Resistance must be wire wound type
- (D) Temperature at positive end should be more than the
temperature at negative end
2. 1 angstrom is equal to
- (A) 108 mm
- (B) 10-6 cm
- (C) 10-10 m
- (D) 10-14 m
3. Out of the following which is an insulating material?
- (A) Copper
- (B) Gold
- (C) Silver
- (D) Paper
4. A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is
- (A) 6.4 A, 6.9 A
- (B) 6.4 A, 9.6 A
- (C) 4.6 A, 6.9 A
- (D) 4.6 A, 9.6 A
5. All of the following are equivalent to watt except
- (A) (Amperes) ohm
- (B) Joules/sec.
- (C) Amperes × volts
- (D) Amperes/volt
6. Which of the following statement is true?
- (A) A galvanometer with low resistance in
parallel is a voltmeter
- (B) A galvanometer with high resistance in parallel is
a voltmeter
- (C) A galvanometer with low resistance in series is an
ammeter
- (D) A galvanometer with high resistance in series is an
ammeter
7. An electric filament bulb can be worked from
- (A) D.C. supply only
- (B) A.C. supply only
- (C) Battery supply only
- (D) All above
8. In a lamp load when more than one lamp are switched on the total resistance of the load
- (A) Increases
- (B) Decreases
- (C) Remains same
- (D) None of the above
9. Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes
- (A) 1/9 times
- (B) 3 times
- (C) 9 times
- (D) Unchanged
10. The weight of an aluminium conductor as compared to a copper conductor of identical cross-section, for the same electrical resistance, is
- (A) 50 %
- (B) 60 %
- (C) 100 %
- (D) 150 %