1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
Two rods are joined end to end, as shown. Both have a cross-sectional area of 0.01 cm2. Each is 1 meter long. One rod is of copper with a resistivity of 1.7 $$ \times $$ 10$$-$$6 ohm-centimeter, the other is of iron with a resistivity of 10$$-$$5 ohm-centimeter.
NEET 2013 (Karnataka) Physics - Current Electricity Question 89 English
How much voltage is required to produce a current of 1 ampere in the rods?
A
0.00145 V
B
0.0145 V
C
1.7 $$ \times $$ 10$$-$$6 V
D
0.117 V
2
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
A 12 cm wire is given a shape of a right angled triangle ABC having sides 3 cm, 4 cm and 5 cm as shown in the figure. The resistance between two ends (AB, BC, CA) of the respective sides are measuread one by one ratio
NEET 2013 (Karnataka) Physics - Current Electricity Question 88 English
A
9 : 16 : 25
B
27 : 32 : 35
C
21 : 24 : 25
D
3 : 4 : 5
3
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
Ten identical cells connected in series are needed to heat a wire of length one meter and radius 'r' by 10oC in time 't'. How many cells will be required to heat the wire of length two meter of the same radius by the same temperature in time 't' ?
A
20
B
30
C
40
D
10
4
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
A long straight wire carries a certain current and produces a magnetic field 2 $$ \times $$ 10$$-$$4 Wb m$$-$$2 at a perpendicular distance of 5 cm from the wire. An electron situated at 5 cm from the wire moves with a velocity 107 m/s towards the wire along perpendicular to it. The force experienced by the electron will be (charge on electron 1.6 $$ \times $$ 10$$-$$19 C)
A
3.2 N
B
3.2 $$ \times $$ 10$$-$$16 N
C
1.6 $$ \times $$ 10$$-$$16 N
D
zero
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