MHT CET 2021 22th September Morning Shift | Current Electricity Question 36 | Physics

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

$$\frac{P}{Q}=\frac{2 R}{S_1+S_2}$$

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

$$\frac{P}{Q}=\frac{R\left(S_1+S_2\right)}{S_1 S_2}$$

$$\frac{P}{Q}=\frac{R\left(S_1 S_2\right)}{S_1+S_2}$$

MHT CET 2021 22th September Morning Shift

MCQ (Single Correct Answer)

-0

If a current flowing in a coil is reduced to half of its initial value, the relation between the new energy $$\left(E_2\right)$$ and the original energy $$\left(E_1\right)$$ stored in the coil will be

$$E_2=\frac{E_1}{4}$$

$$\mathrm{E}_2=\frac{\mathrm{E}_1}{2}$$

$$\mathrm{E}_2=\mathrm{E}_1$$

$$\mathrm{E}_2=4 \mathrm{E}_1$$

MHT CET 2021 22th September Morning Shift

MCQ (Single Correct Answer)

-0

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

charge, energy

charge, momentum

energy, charge

momentum, charge

MHT CET 2021 21th September Evening Shift

MCQ (Single Correct Answer)

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A moving coil galvanometer is converted into an ammeter, reading upto $$0.04 \mathrm{~A}$$ by connecting a shunt of resistance '$$3 \mathrm{r}$$' across it and then into an ammeter reading upto $$0.8 \mathrm{~A}$$, when a shunt of resistance '$$r$$' is connected across it. What is the maximum current which can be sent through this galvanometer if no shunt is used?

$$0.02 \mathrm{~A}$$

$$0.04 \mathrm{~A}$$

$$0.08 \mathrm{~A}$$

$$0.01 \mathrm{~A}$$

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