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How many right angles do you make if you start facing(a) south and turn clockwise to west?(b) north and turn anti-clockwise to east?(c) west and turn to west?(d) south and turn to north?

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How many right angles do you make if you start facing(a) south and turn clockwise to west?(b) north and turn anti-clockwise to east?(c) west and turn to west?(d) south and turn to north?

a)one right angled triangle

b)three right angled triangle

c)four right angled triangle

d)two right angled triangle.

b)three right angled triangle

c)four right angled triangle

d)two right angled triangle.

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A working transitor with its three legs marked \({P},{Q}{\quad\text{and}\quad}{R}\) is tested using a multimeter No conduction is found between \({P},{Q}\)by connecting the common (negative) terminal of the multimeter to \({R}\)and the other (positive) terminal to or \({Q}\) some resistance is seen on the multimeter . Which of the following is true for the transistor ?

(A) It is an npn transistor with R as base

(B) It is a pnp transistor with R as collector

(C) It is a pnp transistor with R as emitter

(D) It is an npn transistor with R as collector

(A) It is an npn transistor with R as base

(B) It is a pnp transistor with R as collector

(C) It is a pnp transistor with R as emitter

(D) It is an npn transistor with R as collector

\({C}_{{{p}}}\) nad \({C}_{{{v}}}\) are specific heats at constant pressure and constant volume respectively. It is observed that

\({C}_{{{p}}}-{C}_{{{v}}}={a}\) for hydrogen gas

\({C}_{{{p}}}-{C}_{{{v}}}={b}\) for niotrogen gas

The correct relation between a and b is

(A) a=28 b

(B) \({a}=\frac{{{1}}}{{{14}}}{b}\)

(C) \({a}={b}\)

(D) \({a}={14}{b}\)

\({C}_{{{p}}}-{C}_{{{v}}}={a}\) for hydrogen gas

\({C}_{{{p}}}-{C}_{{{v}}}={b}\) for niotrogen gas

The correct relation between a and b is

(A) a=28 b

(B) \({a}=\frac{{{1}}}{{{14}}}{b}\)

(C) \({a}={b}\)

(D) \({a}={14}{b}\)

The complex showing a spin -magnetic momnet of \({2.82}{B}{M}\) is .

(A) \({N}{i}{\left({C}{O}\right)}_{{{4}}}\)

(B) \({\left[{N}{i}{C}{l}_{{{4}}}\right]}^{{{2}-}}\)

(C) \({N}{i}{\left({P}{P}{h}_{{{3}}}\right)}_{{{4}}}\)

(D) \({\left[{N}{i}{\left({C}{N}\right)}_{{{4}}}\right]}^{{{2}-}}\)

(A) \({N}{i}{\left({C}{O}\right)}_{{{4}}}\)

(B) \({\left[{N}{i}{C}{l}_{{{4}}}\right]}^{{{2}-}}\)

(C) \({N}{i}{\left({P}{P}{h}_{{{3}}}\right)}_{{{4}}}\)

(D) \({\left[{N}{i}{\left({C}{N}\right)}_{{{4}}}\right]}^{{{2}-}}\)

The ages in years of 10 teachers of a school are: 32, 41, 28, 54, 35, 26, 23, 33, 38, 40 (i) What is the age of the oldest teacher and that of the youngest teacher?(ii) What is the range of the ages of the teachers? (iii) What is the mean age of these teachers?

Write the following rational numbers in ascending order: (i) \(\frac{{-{3}}}{{5}},\frac{{-{2}}}{{5}},\frac{{-{1}}}{{5}}\) (ii) \(\frac{{-{1}}}{{3}},\frac{{-{2}}}{{9}},\frac{{-{4}}}{{3}}\) (iii) \(\frac{{-{3}}}{{7}},\frac{{-{3}}}{{2}},\frac{{-{3}}}{{4}}\)

Example \({7}\).Can you tell which one is greater\({\left({5}^{{2}}\right)}\times{3}\) or \({\left({5}^{{2}}\right)}^{{5}}\) ?Example \({8}\).Express the following terms in the exponential form : (i) \({\left({2}\times{3}\right)}^{{5}}\) (ii) \({\left({2}{a}\right)}^{{4}}\) (iii) \({\left(-{4}{m}\right)}^{{3}}\)

Suppose a quantilty x can be dimensionally represented in terms of M,L and T, that is \({\left[{x}\right]},{M}^{{a}}{L}^{{b}}{T}^{{c}}\). The quantity mass

(A) can always be dimensionally represented in terms of L, T and x

(B) can never be dimensionally represented in terms of L, T and x.

(C) May be represented in terms of L, T and x if \({a}\ne{0}\)

(D) does not exist

(A) can always be dimensionally represented in terms of L, T and x

(B) can never be dimensionally represented in terms of L, T and x.

(C) May be represented in terms of L, T and x if \({a}\ne{0}\)

(D) does not exist

IN a typical Indian Bugghi(a luxury cart drawn by horses), a wooden plate is fixed on the rear on which one person can sit. A bughi ofmas 200 kg is moving at a seed of 10 km/h. As it overtakes a school boy walking at a speed of 4 km/h,. the boy sits on the wooden plate. If the mass of the boy is 25 kg, what will be the new velocity of the bugghi?

A particle moves on the X-axis according to the equation \({x}={A}+{B}{\sin{\omega}}{t}\). Let motion is simple harmonic with amplitude

(A) \({A}\)

(B) \({B}\)

(C) \({A}+{B}\)

(D) \(\sqrt{{{A}^{{2}}+{B}^{{2}}}}\)

(A) \({A}\)

(B) \({B}\)

(C) \({A}+{B}\)

(D) \(\sqrt{{{A}^{{2}}+{B}^{{2}}}}\)

A copper wire of radius 0.1mm and resistance \({1}{k}{\left(\Omega\right)}\)is connected across a power supply of 20 V.(a)How man electorns are transferred per second between the supply and the wire at one end?(b) Write down the current density in the wire.

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