A black body emits heat at the rate of 20 W. When its temperature is 727 ° C. Another black body emits heat at the rate of 15W, when its temperature is 227 º C. Compare the area of the surface of the two bodies, if the surrounding is at NTP.
1. 16 : 1
2. 1 : 4
3. 12 : 1
4. 1 : 12
A black body emits heat at the rate of 20 W. When its temperature is 727 ° C. Another black body emits heat at the rate of 15W, when its temperature is 227 º C. Compare the area of the surface of the two bodies, if the surrounding is at NTP.
1. 16 : 1
2. 1 : 4
3. 12 : 1
4. 1 : 12
Subtopic: Conduction |
51%
Please attempt this question first.
Hints
The pressure on a square plate is measured by measuring the force on the plate and the length of the sides of the plate by using the formula . If the maximum errors in the measurement of force and length are 4% and 2% respectively, then the maximum error in the measurement of pressure is
1. 1%
2. 2%
3. 8%
4. 10%
Subtopic: Errors |
88%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
The transfer ratio β of a transistor is 50. The input resistance of the transistor, when used in the common emitter mode is 1kΩ. The peak value of the collector alternating current for an input peak voltage of 0.01 V is
1. 
Subtopic: Transistor (OLD NCERT) |
61%
Please attempt this question first.
Hints
Four resistance 
are connected so that they form the side of a rectangle AB, BC, CD and DA respectively. Another resistance of 
is connected across the diagonal AC. The equivalent resistance between A and B is
are connected so that they form the side of a rectangle AB, BC, CD and DA respectively. Another resistance of is connected across the diagonal AC. The equivalent resistance between A and B is1. 2Ω
2. 5Ω
3. 7Ω
4. 10Ω
2. 5Ω
3. 7Ω
4. 10Ω
Subtopic: Combination of Resistors |
62%
Please attempt this question first.
Hints
The velocity of a particle moving in the x – y plane is given by
and 
Where, t = 0, x = 8 and y = 0, the path of the particle is
and Where, t = 0, x = 8 and y = 0, the path of the particle is
1. A straight line
2. an ellipse
3. a circle
4. a parabola
2. an ellipse
3. a circle
4. a parabola
Subtopic: Speed & Velocity |
56%
Please attempt this question first.
Hints
A weight w is suspended from the midpoint of a rope, whose ends are at the same level. In other to make the rope perfectly horizontal, the force applied to each of its ends must be
1. less than w
2. equal to w
3. equal to 2 w
4. infinitely large
Subtopic: Application of Laws |
Please attempt this question first.
Hints
A particle moves along a curve of unknown shape but magnitude of force F is constant and always acts along tangent to the curve. Then,
1. F may be conservative
2. F must be conservative
3. F may be non-conservative
4. F must be non-conservative
2. F must be conservative
3. F may be non-conservative
4. F must be non-conservative
Subtopic: Work Energy Theorem |
Please attempt this question first.
Hints
A block has been placed on an inclined plane with the slope angle θ, block slide down the plane at constant speed. The coefficient of kinetic friction is equal to
1. sin θ
2. cos θ
3. g
4. tan θ
Subtopic: Friction |
60%
Please attempt this question first.
Hints
© 2024 GoodEd Technologies Pvt. Ltd.