MCQ
Mark out the correct options.
- AAn ammeter should have small resistance.
- BAn ammeter should have large resistance.
- CAvoltmeter should have large resistance.
- ✓Both $(A)$ and $(C)$
✓
Answer
Correct option: D.
Both $(A)$ and $(C)$
d
Smaller the resistance of an ammeter more accurate will be its reading. An ammeter is said to be ideal if its resistance is zero, i.e. it shows actual (value of) current flowing through the circuit. Also, greater the resistance of voltmeter, more accurate will be its reading. A voltmeter is said to be ideal if its resistance is infinite, i.e, it draws no current from the circuit element for its operation. Hence, an ammeter should have small resistance and a voltmeter should have large resistance.
Smaller the resistance of an ammeter more accurate will be its reading. An ammeter is said to be ideal if its resistance is zero, i.e. it shows actual (value of) current flowing through the circuit. Also, greater the resistance of voltmeter, more accurate will be its reading. A voltmeter is said to be ideal if its resistance is infinite, i.e, it draws no current from the circuit element for its operation. Hence, an ammeter should have small resistance and a voltmeter should have large resistance.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In the given circuit, calculate the value of current in $4.5\,\Omega $ resistor .............. $\mathrm{A}$
→A nucleus $_n{X^m}$emits one $\alpha $ and one $\beta $ particles. The resulting nucleus is
→Consider the circuits shown in the figure. Both the circuits are taking same current from battery but current through R in the second circuit is $\frac{1}{10}$ th of current through R in the first circuit. If R is 11 $\Omega$, the value of $R_1$
→Why are alkali metals most suited as photo$-$sensitive metals?
→A white light is passed through the two narrow slits and produced a pattern of alternating bright and dark lines on the screen as shown above. What will effects on the central bright band , if the distance between screen and slits are increased?
Determine the angular separation between central maximum and first order maxima of the diffraction pattern due to a single slit of width $0.25\, mm$ when light of wavelength $5890\,\mathop A\limits^o $ is incident on it
→When a potential difference is applied across the ends of a linear metallic conductor
Eight dipoles of charges of magnitude $e$ are placed inside a cube. The total electric flux coming out of the cube will be
→Relative permeability of iron is $5500,$ then its magnetic susceptibility will be
→Given below are two statements:
→Statement $I :$ An electric dipole is placed at the centre of a hollow sphere. The flux of electric field through the sphere is zero but the electric field is not zero anywhere in the sphere.
Statement $II :$ If $R$ is the radius of a solid metallic sphere and $Q$ be the total charge on it. The electric field at any point on the spherical surface of radius $r ( < R )$ is zero but the electric flux passing through this closed spherical surface of radius $r$ is not zero.
In the light of the above statements, choose the correct answer from the options given below: