KCET 2025 | Current Electricity Question 6 | Physics

Two similar galvanometers are covered into an ammeter and a milliammeter. The shunt resistance of ammeter as compared to the shunt resistance of milliammeter will be

Zero

Less

Equal

KCET 2025

MCQ (Single Correct Answer)

-0

The range of electrical conductivity $(\sigma)$ and resistivity $(\rho)$ for metals, among the following, is

$$ \begin{aligned} & \rho \rightarrow 10^{-5}-10^{-6} \Omega \mathrm{~m} \\ & \sigma \rightarrow 10^5-10^{-6} \mathrm{Sm}^{-1} \end{aligned} $$

$$ \begin{aligned} & \rho \rightarrow 10^{11}-10^{19} \Omega \mathrm{~m} \\ & \sigma \rightarrow 10^{-11}-10^{-19} \mathrm{Sm}^{-1} \end{aligned} $$

$$ \begin{aligned} & \rho \rightarrow 10^2-10^8 \Omega \mathrm{~m} \\ & \sigma \rightarrow 10^{-2}-10^{-8} \mathrm{Sm}^{-1} \end{aligned} $$

$$ \begin{aligned} & \rho \rightarrow 10^{-2}-10^{-8} \Omega m \\ & \sigma \rightarrow 10^2-10^8 \mathrm{Sm}^{-1} \end{aligned} $$

KCET 2025

MCQ (Single Correct Answer)

-0

In an experiment to determine the figure of merit of a galvanometer by half deflection method, a student constructed the following circuit.

KCET 2025 Physics - Current Electricity Question 4 English

He unplugged a resistance of $5200 \Omega$ in R . When $\mathrm{K}_1$ is closed and $\mathrm{K}_2$ is open, the deflection observed in the galvanometer is 26 div. When $K_2$ is also closed and a resistance of $90 \Omega$ is removed in S , the deflection between 13 div. The resistance of galvanometer is nearly

$45.0 \Omega$

$103.0 \Omega$

$91.6 \Omega$

$116.0 \Omega$

KCET 2024

MCQ (Single Correct Answer)

-0

E is the electric field inside a conductor whose material has conductivity $\sigma$ and resistivity $\rho$. The current density inside the conductor is $\mathbf{J}$. The correct form of Ohm's law is

$\mathbf{E}=\sigma \mathbf{J}$

$\mathbf{J}=\rho \mathbf{E}$

$\mathrm{E=\rho J}$

$\mathbf{E} \cdot \mathbf{J}=\rho$

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