CTET Solved Paper - UPTET Feburary 2014 Paper2
- Option : D
- Explanation : Negative sign shows the opposite direction of the given vector, also the magnitude of the vector is multiplied by 2. So the required vector -2A = 20 cm south.
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- Option : C
- Explanation : We know that, F = qvBsin θ;
where, q = Charge
v = Velocity of charge
B = Magnetic field
Q = Angle between magnetic field and motion of charge = 0
So, F = qvBsin0° = 0.
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- Option : A
- Explanation : Coefficient of linear expansion → α
Coefficient of superficial expansion → β
Coefficient of volume expansion → γ
Where, β = 2α and γ = 3α
So, α : β : γ = 1 : 2 : 3.
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104. The pH value of any solution that converts red litmus to blue in colour will be
- Option : D
- Explanation : A red litmus turns blue when the solution is basic i.e. must have a pH value greater than 7.
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- Option : A
- Explanation : Marsh gas is commonly known as biogas which forms in wetland whose principle components arc methane, phospin and di-phosphorus pentahydrade.
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