Physics-
General
Easy
Question
When objects at different distances are seen by the eye, which of the following remain constant?
- The focal length of the eye–lens
- The object–distance from the eye–lens
- The radii of curvature of the eye–lens
- The image–distance from the eye–lens
The correct answer is: The image–distance from the eye–lens
Related Questions to study
physics-
The energy of a tungsten atom with a vacancy in L shell is 11.3 KeV. Wavelength of 
photon for tungsten is 21.3 pm. If a potential difference of 62 KV is applied across the x-rays tube following characteristic x-rays will be produced.
The energy of a tungsten atom with a vacancy in L shell is 11.3 KeV. Wavelength of photon for tungsten is 21.3 pm. If a potential difference of 62 KV is applied across the x-rays tube following characteristic x-rays will be produced.
physics-General
physics-
The figure shows a graph between 
and ln | n |, where An is the area enclosed by the nth orbit in a hydrogen like atom. The correct curve is :
The figure shows a graph between and ln | n |, where An is the area enclosed by the nth orbit in a hydrogen like atom. The correct curve is :
physics-General
physics-
A resistance & ideal inductor is connected in the A.C. circuit. Here 
are the reading of three hotwire ideal voltmeter
A resistance & ideal inductor is connected in the A.C. circuit. Here are the reading of three hotwire ideal voltmeter
physics-General
physics-
The A.C. circuit shown in figure. Find the frequency (
) of the AC voltage source so that current through the source will be in same phase as of voltage of source.
The A.C. circuit shown in figure. Find the frequency () of the AC voltage source so that current through the source will be in same phase as of voltage of source.
physics-General
physics-
Find the power factor of the circuit
Find the power factor of the circuit
physics-General
physics-
In the figure the reading of voltmeter is
In the figure the reading of voltmeter is
physics-General
physics-
In the figure, if 
?
In the figure, if ?
physics-General
physics-
A block of mass ‘m’ is attached to a spring in natural length of spring constant ‘k’. The other end A of the spring is moved with a constant velocity v away from the block. Find the maximum extension in the spring
A block of mass ‘m’ is attached to a spring in natural length of spring constant ‘k’. The other end A of the spring is moved with a constant velocity v away from the block. Find the maximum extension in the spring
physics-General
physics-
The switch in the circuit pictured is in position a for a long time. At t = 0 the switch is moved from a to b. The current through the inductor will reach its first maximum after moving the switch in a time:
The switch in the circuit pictured is in position a for a long time. At t = 0 the switch is moved from a to b. The current through the inductor will reach its first maximum after moving the switch in a time:
physics-General
physics-
The circuit shown in figure consisting of three identical lamps and two coils is connected to a direct current source. The ohmic resistance of the coils is negligible. After some time switch S is opened. Which of the following statement(s) is/are correct for the instant immediately after opening the switch?
The circuit shown in figure consisting of three identical lamps and two coils is connected to a direct current source. The ohmic resistance of the coils is negligible. After some time switch S is opened. Which of the following statement(s) is/are correct for the instant immediately after opening the switch?
physics-General
physics-
The diagram shows a solenoid carrying time varying current I = I0 t (I0 is constant) On the axis of this solenoid a conducting ring is being placed as shown in figure. The mutual inductance of the ring and the solenoid is M and self inductance of the ring is L. If the resistance of the ring is R then the maximum current which can flow through the ring is
The diagram shows a solenoid carrying time varying current I = I0 t (I0 is constant) On the axis of this solenoid a conducting ring is being placed as shown in figure. The mutual inductance of the ring and the solenoid is M and self inductance of the ring is L. If the resistance of the ring is R then the maximum current which can flow through the ring is
physics-General
physics-
The maximum compression in the spring
The maximum compression in the spring
physics-General
physics-
A solenoid is oriented end-on so that its opening is perpendicular to the circuit containing the two light bulbs as drawn in figure C1. For figure C2 and C3, a shorting wire of negligible resistance is added as shown. Assume that the magnetic field from the solenoid, shown coming out of the plane of the page, decreases uniformly with time at the same rate for each circuit. Rank the circuits for the brightness of the bulb labeled R1 from brightest to dimmest.
A solenoid is oriented end-on so that its opening is perpendicular to the circuit containing the two light bulbs as drawn in figure C1. For figure C2 and C3, a shorting wire of negligible resistance is added as shown. Assume that the magnetic field from the solenoid, shown coming out of the plane of the page, decreases uniformly with time at the same rate for each circuit. Rank the circuits for the brightness of the bulb labeled R1 from brightest to dimmest.
physics-General
physics-
A wire frame as shown in figure is made to rotate about a vertical axis passing through O. There exists a uniform horizontal magnetic field of induction B = 1 Tesla if 
If the frame rotates (slowly) about 'O' with angular velocity directed along Z-axis having magnitude w = 4rad/s, the potential difference between O & B is
A wire frame as shown in figure is made to rotate about a vertical axis passing through O. There exists a uniform horizontal magnetic field of induction B = 1 Tesla if If the frame rotates (slowly) about 'O' with angular velocity directed along Z-axis having magnitude w = 4rad/s, the potential difference between O & B is
physics-General
physics-
There exists a uniform but time varying magnetic field B = a + bt normal to plane of paper in a cylindrical region as shown. A rectangular conducting loop is placed as shown. Induced emf in branches AB and BC are
There exists a uniform but time varying magnetic field B = a + bt normal to plane of paper in a cylindrical region as shown. A rectangular conducting loop is placed as shown. Induced emf in branches AB and BC are
physics-General
