Three resistors having resistances r1, r2 and r3 are connected as shown in the given circuit. The ratio $${{{i_3}} \over {{i_1}}}$$ of currents in terms of resistances used in the circuit is :
A
$${{{r_2}} \over {{r_1} + {r_3}}}$$
B
$${{{r_1}} \over {{r_2} + {r_3}}}$$
C
$${{{r_2}} \over {{r_2} + {r_3}}}$$
D
$${{{r_1}} \over {{r_1} + {r_2}}}$$
2
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
A resistance wire connected in the left gap of a metre bridge balances a 10 $$\Omega $$
resistance in the right gap at a point which divides the bridge wire in the ratio 3:2. If the length of the resistance wire is 1.5 m, then the length of 1 $$\Omega $$ of the resistance wire is :
A
$$1.0 \times {10^{ - 1}}m$$
B
$$1.5 \times {10^{ - 1}}m$$
C
$$1.5 \times {10^{ - 2}}m$$
D
$$1.0 \times {10^{ - 2}}m$$
3
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
The color code of a resistance is given below : The values of resistance and tolerance, respectively, are
A
47 k$$\Omega $$
, 10%
B
4.7 k$$\Omega $$
, 5%
C
470 $$\Omega $$
, 5%
D
470 k$$\Omega $$
, 5%
4
NEET 2020 Phase 1
MCQ (Single Correct Answer)
+4
-1
A charged particle having drift velocity 7.5$$ \times $$10-4 ms-1 in an electric field of 3$$ \times $$10-10 Vm-1 has a mobility in m2 V-1s-1 of :
