1
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

In potentiometer experiment, cells of e.m.f. '$$E_1$$' and '$$E_2$$' are connected in series $$\left(E_1>E_2\right)$$ the balancing length is $$64 \mathrm{~cm}$$ of the wire. If the polarity of $$E_2$$ is reversed, the balancing length becomes $$32 \mathrm{~cm}$$. The ratio $$\frac{E_1}{E_2}$$ is

A
$$1: 1$$
B
$$6: 1$$
C
$$3: 1$$
D
$$2: 1$$
2
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a potentiometer experiment, the balancing length for a cell is $$240 \mathrm{~cm}$$. On shunting the cell with a resistance of $$2 \Omega$$, the balancing length becomes half the initial balancing length. The internal resistance of the cell is

A
$$1.5 \Omega$$
B
$$1 \Omega$$
C
$$0.5 \Omega$$
D
$$2 \Omega$$
3
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Kirchhoff's current and voltage law are respectively based on the conservation of

A
momentum, charge
B
energy, charge
C
charge, energy
D
charge, momentum
4
MHT CET 2021 22th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

In a wheatstone's bridge, three resistances $$\mathrm{P}, \mathrm{Q}$$ and $$\mathrm{R}$$ are connected in the three arms and the fourth arm is formed by two resistances $$S_1$$ and $$S_2$$ connected in parallel. The condition for the bridge to be balanced is

A
$$\frac{P}{Q}=\frac{2 R}{S_1+S_2}$$
B
$$\frac{P}{Q}=\frac{R\left(S_1+S_2\right)}{2 S_1 S_2}$$
C
$$\frac{P}{Q}=\frac{R\left(S_1+S_2\right)}{S_1 S_2}$$
D
$$\frac{P}{Q}=\frac{R\left(S_1 S_2\right)}{S_1+S_2}$$
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