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Alok Singh
Subject: Physics
, asked on 11/5/18
Solve this:
Q. Find the current in each branch of the given circuit :
Answer
1
Vivek Kumar
Subject: Physics
, asked on 10/5/18
Why the direction of current is opposite to the flow of electrons
Answer
2
Prerna Varshney
Subject: Physics
, asked on 10/5/18
Please don't give link and give proper reasons of each step in your solution with suitable figure (correct option is d)
Q7. A disc of mass 100 g is kept floating horizontally in air by firing bullets, each of mass 5 g with the same velocity at the same rate of 10 bullets/s. The bullets rebound with the same speed in opposite direction, the velocity of each bullet at the time of impact is
(a) 196 cm
–1
(b) 9.8 cms
–1
(c) 98 cms
–1
(d) 980 cms
–1
Answer
2
Prerna Varshney
Subject: Physics
, asked on 10/5/18
Please don't give link and give proper reason of each step in your solution with suitable figure ( correct option is a)
Answer
1
Prerna Varshney
Subject: Physics
, asked on 10/5/18
Please don't give links and give proper reasons of each step in your solution with your suitable figure ( the correct option of given question is b)
Answer
1
Aloysius
Subject: Physics
, asked on 9/5/18
is drift velocity proportional or inversely proportional to area of cross section
Answer
1
Dikshit Jain
Subject: Physics
, asked on 9/5/18
Solve this:
Answer
1
Bhavya Jain
Subject: Physics
, asked on 9/5/18
How to solve the following thermal conductivity question? (can it be solved by both normal method and circuit analogy method? )
Q.10. Two rods P and O of same length and same diameter having thermal conductivity ratio joined end to end. If temperature at one end of P is 100
°
C
and at one end of Q is 0
°
C
, then temperature of interface is
a. 60
°
C
b. 70
°
C
c. 50
°
C
d. 40
°
C
Answer
1
Gaurav
Subject: Physics
, asked on 6/5/18
Q1 and Q2
Answer
1
Prerna Varshney
Subject: Physics
, asked on 3/5/18
Please don't give link and give proper reason for each step in your solution with suitable figure
Q.25. A car wheel is rotated to uniform angular acceleration about its axis. Initially its angular velocity is zero. It rotates through an angle
θ
1
in the first 2 s, in the next 2 s, it rotates through an additional angle
θ
2
, the ratio of
θ
2
θ
1
is
(a) 1
(b) 2
(c) 3
(d) 5
Answer
1
Prerna Varshney
Subject: Physics
, asked on 3/5/18
Please don't give links and give proper reason for each step in your solution with suitable diagram
Q.23. An aircraft executes a horizontal loop of radius 1 km with a speed of 900 km
h
-
1
. Ratio of centripetal acceleration to acceleration due to gravity is
(a) 12.3
(b) 3.3
(c) 6.4
(d) None of these
Answer
1
Prerna Varshney
Subject: Physics
, asked on 3/5/18
Please give proper reason of each step of your solution with suitable diagram .(don't give links )
21.
A 70 kg man stands in contact against the inner wall of a hollow cylindrical drum of radius 3m rotating about its vertical axis with 200 rev/min. The coefficient of friction between the wall and his clothing is 0.15. When the floor is suddenly removed, what is the minimum rotational speed of the cylinder to enable the man to remain stuck to the wall without falling (approximately) ?
(a) 5 rad/s (b) 10 rad/s (c) 15 rad/s (d) 20 rad/s
Answer
1
Vivek Kumar
Subject: Physics
, asked on 3/5/18
Can you explain temperature dependency of resistivity with step wise equations
Answer
1
Vivek Kumar
Subject: Physics
, asked on 3/5/18
Please answer this
Q.
Find the equivalent resistance b/w points A & B at the infinite sequence of resistors shown in the figure
Answer
1
Tulsi Mehta
Subject: Physics
, asked on 3/5/18
Solve this:
Answer
1
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What are you looking for?
Q. Find the current in each branch of the given circuit :
Q7. A disc of mass 100 g is kept floating horizontally in air by firing bullets, each of mass 5 g with the same velocity at the same rate of 10 bullets/s. The bullets rebound with the same speed in opposite direction, the velocity of each bullet at the time of impact is
(a) 196 cm–1 (b) 9.8 cms–1
(c) 98 cms–1 (d) 980 cms–1
Q.10. Two rods P and O of same length and same diameter having thermal conductivity ratio joined end to end. If temperature at one end of P is 100 and at one end of Q is 0, then temperature of interface is
a. 60
b. 70
c. 50
d. 40
Q.25. A car wheel is rotated to uniform angular acceleration about its axis. Initially its angular velocity is zero. It rotates through an angle in the first 2 s, in the next 2 s, it rotates through an additional angle , the ratio of is
(a) 1
(b) 2
(c) 3
(d) 5
Q.23. An aircraft executes a horizontal loop of radius 1 km with a speed of 900 km. Ratio of centripetal acceleration to acceleration due to gravity is
(a) 12.3
(b) 3.3
(c) 6.4
(d) None of these
21. A 70 kg man stands in contact against the inner wall of a hollow cylindrical drum of radius 3m rotating about its vertical axis with 200 rev/min. The coefficient of friction between the wall and his clothing is 0.15. When the floor is suddenly removed, what is the minimum rotational speed of the cylinder to enable the man to remain stuck to the wall without falling (approximately) ?
(a) 5 rad/s (b) 10 rad/s (c) 15 rad/s (d) 20 rad/s
Q. Find the equivalent resistance b/w points A & B at the infinite sequence of resistors shown in the figure