163190
In a metallic sheet shown in the figure there are two holes A and B. When heat is supplied to the sheet the diameter of : [RBQ]
1 Hole A increases while the diameter of hole B decreases
2 Hole B increases while the diameter of hole A decreases
3 Both holes is increases
4 Both holes decreases
Explanation:
NCERT-XI-I-205
6 RBTS PAPER
163191
If a \(\mathbf{5} \mathbf{~ k g}\) body falls to the ground from a height of \(30 \mathrm{~m}\) and if all of its mechanical energy is converted into heat. The heat produced will be (approx) \(\left(g=10 \mathrm{~m} / \mathrm{s}^2\right)\) [RBQ]
163192
The coefficient of volume expansion of glycerin is \(49 \times 10^{-5} \mathrm{~K}^{-1}\). What is the fractional change in its density for a \(30^{\circ} \mathrm{C}\) rise in temperature : [RBQ]
1 0.567
2 0.0147
3 0.147
4 0.975
Explanation:
Fractional change in its density \(=\gamma \times \Delta t\) \(=49 \times 10^{-5} \times 30=.0147\)
NCERT-XI-I-205
6 RBTS PAPER
163209
If in a wire of Young's modulus \(Y\), longitudinal strain \(X\) is produced, then the value of potential energy stored in its unit volume will be [RBQ]
1 \(Y X^2\)
2 \(2 Y X^2\)
3 \(Y^2 X / 2\)
4 \(Y X^2 / 2\)
Explanation:
Elastic potential energy per unit volume \(=\frac{1}{2} \times \text { Young's modulus } \times \text { strain }^2\) \(=\frac{1}{2} \mathrm{YX} \mathrm{X}^2\)
163190
In a metallic sheet shown in the figure there are two holes A and B. When heat is supplied to the sheet the diameter of : [RBQ]
1 Hole A increases while the diameter of hole B decreases
2 Hole B increases while the diameter of hole A decreases
3 Both holes is increases
4 Both holes decreases
Explanation:
NCERT-XI-I-205
6 RBTS PAPER
163191
If a \(\mathbf{5} \mathbf{~ k g}\) body falls to the ground from a height of \(30 \mathrm{~m}\) and if all of its mechanical energy is converted into heat. The heat produced will be (approx) \(\left(g=10 \mathrm{~m} / \mathrm{s}^2\right)\) [RBQ]
163192
The coefficient of volume expansion of glycerin is \(49 \times 10^{-5} \mathrm{~K}^{-1}\). What is the fractional change in its density for a \(30^{\circ} \mathrm{C}\) rise in temperature : [RBQ]
1 0.567
2 0.0147
3 0.147
4 0.975
Explanation:
Fractional change in its density \(=\gamma \times \Delta t\) \(=49 \times 10^{-5} \times 30=.0147\)
NCERT-XI-I-205
6 RBTS PAPER
163209
If in a wire of Young's modulus \(Y\), longitudinal strain \(X\) is produced, then the value of potential energy stored in its unit volume will be [RBQ]
1 \(Y X^2\)
2 \(2 Y X^2\)
3 \(Y^2 X / 2\)
4 \(Y X^2 / 2\)
Explanation:
Elastic potential energy per unit volume \(=\frac{1}{2} \times \text { Young's modulus } \times \text { strain }^2\) \(=\frac{1}{2} \mathrm{YX} \mathrm{X}^2\)
163190
In a metallic sheet shown in the figure there are two holes A and B. When heat is supplied to the sheet the diameter of : [RBQ]
1 Hole A increases while the diameter of hole B decreases
2 Hole B increases while the diameter of hole A decreases
3 Both holes is increases
4 Both holes decreases
Explanation:
NCERT-XI-I-205
6 RBTS PAPER
163191
If a \(\mathbf{5} \mathbf{~ k g}\) body falls to the ground from a height of \(30 \mathrm{~m}\) and if all of its mechanical energy is converted into heat. The heat produced will be (approx) \(\left(g=10 \mathrm{~m} / \mathrm{s}^2\right)\) [RBQ]
163192
The coefficient of volume expansion of glycerin is \(49 \times 10^{-5} \mathrm{~K}^{-1}\). What is the fractional change in its density for a \(30^{\circ} \mathrm{C}\) rise in temperature : [RBQ]
1 0.567
2 0.0147
3 0.147
4 0.975
Explanation:
Fractional change in its density \(=\gamma \times \Delta t\) \(=49 \times 10^{-5} \times 30=.0147\)
NCERT-XI-I-205
6 RBTS PAPER
163209
If in a wire of Young's modulus \(Y\), longitudinal strain \(X\) is produced, then the value of potential energy stored in its unit volume will be [RBQ]
1 \(Y X^2\)
2 \(2 Y X^2\)
3 \(Y^2 X / 2\)
4 \(Y X^2 / 2\)
Explanation:
Elastic potential energy per unit volume \(=\frac{1}{2} \times \text { Young's modulus } \times \text { strain }^2\) \(=\frac{1}{2} \mathrm{YX} \mathrm{X}^2\)
163190
In a metallic sheet shown in the figure there are two holes A and B. When heat is supplied to the sheet the diameter of : [RBQ]
1 Hole A increases while the diameter of hole B decreases
2 Hole B increases while the diameter of hole A decreases
3 Both holes is increases
4 Both holes decreases
Explanation:
NCERT-XI-I-205
6 RBTS PAPER
163191
If a \(\mathbf{5} \mathbf{~ k g}\) body falls to the ground from a height of \(30 \mathrm{~m}\) and if all of its mechanical energy is converted into heat. The heat produced will be (approx) \(\left(g=10 \mathrm{~m} / \mathrm{s}^2\right)\) [RBQ]
163192
The coefficient of volume expansion of glycerin is \(49 \times 10^{-5} \mathrm{~K}^{-1}\). What is the fractional change in its density for a \(30^{\circ} \mathrm{C}\) rise in temperature : [RBQ]
1 0.567
2 0.0147
3 0.147
4 0.975
Explanation:
Fractional change in its density \(=\gamma \times \Delta t\) \(=49 \times 10^{-5} \times 30=.0147\)
NCERT-XI-I-205
6 RBTS PAPER
163209
If in a wire of Young's modulus \(Y\), longitudinal strain \(X\) is produced, then the value of potential energy stored in its unit volume will be [RBQ]
1 \(Y X^2\)
2 \(2 Y X^2\)
3 \(Y^2 X / 2\)
4 \(Y X^2 / 2\)
Explanation:
Elastic potential energy per unit volume \(=\frac{1}{2} \times \text { Young's modulus } \times \text { strain }^2\) \(=\frac{1}{2} \mathrm{YX} \mathrm{X}^2\)
