Physics-
General
Easy
Question
Three plane mirrors are placed such that the angle between the first and second or second and third is the same ' 
'. A light striking the first mirror, after reflection at the three mirrors emerges qoposite to the initial direction. Find the value of ' '.
- 60°
- 150°
- 120°
- 45°
The correct answer is: 120°
Related Questions to study
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Calculate the deviation suffered by incident ray in situation as shown in figure after three successive reflections.
Calculate the deviation suffered by incident ray in situation as shown in figure after three successive reflections.
physics-General
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Two mirrors, labeled IM for left mirror and RM for right mirror in the adjacent figure, are parallel to each other and 3.0m apart. A person standing 1.0m from the right mirror (RM) looks into this mirror and sees a series of images. How far from the person is the second closest image seen in the right mirror (RM)?
Two mirrors, labeled IM for left mirror and RM for right mirror in the adjacent figure, are parallel to each other and 3.0m apart. A person standing 1.0m from the right mirror (RM) looks into this mirror and sees a series of images. How far from the person is the second closest image seen in the right mirror (RM)?
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The capacitors in figure are initially uncharged and are connected as in the diagram with switch S open. The applied potential difference is 
.
How much charge flowed through the switch when it was closed
The capacitors in figure are initially uncharged and are connected as in the diagram with switch S open. The applied potential difference is .
How much charge flowed through the switch when it was closed
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The capacitors in figure are initially uncharged and are connected as in the diagram with switch S open. The applied potential difference is .
What is the potential difference across each capacitor after switch S is closed
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What is the potential difference across each capacitor after switch S is closed
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The capacitors in figure are initially uncharged and are connected as in the diagram with switch S open. The applied potential difference is .
What is the potential difference 
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What is the potential difference
physics-General
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i) In an isolated system (neither connected to the terminal of a battery nor to any other source of charge e.g. each) net charge remains constant.
ii) From two terminal of a battery or from two plates of a capacitor equal and opposite charges enter or leave.
Question: Two capacitors of capacity 
and 
are charged to 100V and 50 Separately and connected as shown. Now all the three switches 
and 
are closed.
Suppose 
and 
be the magnitudes of charges flown from switches 
and after they are closed. Then :
i) In an isolated system (neither connected to the terminal of a battery nor to any other source of charge e.g. each) net charge remains constant.
ii) From two terminal of a battery or from two plates of a capacitor equal and opposite charges enter or leave.
Question: Two capacitors of capacity and are charged to 100V and 50 Separately and connected as shown. Now all the three switches and are closed.
Suppose and be the magnitudes of charges flown from switches and after they are closed. Then :
physics-General
physics-
i) In an isolated system (neither connected to the terminal of a battery nor to any other source of charge e.g. each) net charge remains constant.
ii) From two terminal of a battery or from two plates of a capacitor equal and opposite charges enter or leave.
Question: Two capacitors of capacity and are charged to 100V and 50 Separately and connected as shown. Now all the three switches and are closed.
Charges on both the capacitors in steady state will be : (on first ):
i) In an isolated system (neither connected to the terminal of a battery nor to any other source of charge e.g. each) net charge remains constant.
ii) From two terminal of a battery or from two plates of a capacitor equal and opposite charges enter or leave.
Question: Two capacitors of capacity and are charged to 100V and 50 Separately and connected as shown. Now all the three switches and are closed.
Charges on both the capacitors in steady state will be : (on first ):
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i) In an isolated system (neither connected to the terminal of a battery nor to any other source of charge e.g. each) net charge remains constant.
ii) From two terminal of a battery or from two plates of a capacitor equal and opposite charges enter or leave.
Question: Two capacitors of capacity and are charged to 100V and 50 Separately and connected as shown. Now all the three switches and are closed.
Which plate (s) form an isolated system :
i) In an isolated system (neither connected to the terminal of a battery nor to any other source of charge e.g. each) net charge remains constant.
ii) From two terminal of a battery or from two plates of a capacitor equal and opposite charges enter or leave.
Question: Two capacitors of capacity and are charged to 100V and 50 Separately and connected as shown. Now all the three switches and are closed.
Which plate (s) form an isolated system :
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Two capacitors of 2mF and 3mF are charged to 150 volt and 120 volt respectively. The plates of capacitor are connected as shown in the figure. A discharged capacitor of capacity 1.5mF falls to the free ends of the wire. Then
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Two capacitors of equal capacitance 
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and 
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Four capacitors and a battery are connected as shown. The potential drop across the 
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Four capacitors and a battery are connected as shown. The potential drop across the capacitor is 6 V. Then the :
physics-General
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In the circuit shown, each capacitor has a capacitance C. The emf of the cell is E. If the switch S is closed
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Find the equivalent capacitance across A & B
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A capacitor is made of a flat plate of area A and a second plate having a stair-like structure as shown in figure. The width of each stair is a and the height is b. Find the capacitance of the assembly.
A capacitor is made of a flat plate of area A and a second plate having a stair-like structure as shown in figure. The width of each stair is a and the height is b. Find the capacitance of the assembly.
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The distance between plates of a parallel plate capacitor is 5 d. Let the positively charged plate is at x=0 and negatively charged plate is at x=5 d. Two slabs one of conductor and other of a dielectric of equal thickness 
are inserted between the plates as shown in figure. Potential versus distance graph will look like :
The distance between plates of a parallel plate capacitor is 5 d. Let the positively charged plate is at x=0 and negatively charged plate is at x=5 d. Two slabs one of conductor and other of a dielectric of equal thickness are inserted between the plates as shown in figure. Potential versus distance graph will look like :
physics-General
